Antibody:	anti-Ki67
Detection system:	Secondary antibody coupled to Cy2

Structure	Level	Pattern	Image	Note
TS17: embryo mesenchyme	Present	Widespread	2c , 2b	Expression in almost all cells of the embryo.
TS17: surface ectoderm	Present	Widespread	2c , 2b	Expression in almost all cells of the embryo.

Structure	Level	Pattern	Image	Note
TS20: epidermis	Present	Widespread	2e , 2f	Expression in virtually all cells of the ectoderm.
TS20: embryo mesenchyme	Ambiguous		2f , 2e	Authors state that most, but not all, cells of mesenchymal origin were negative for staining.

Structure	Level	Pattern	Image	Note
TS22: epidermis	Present	Regionally restricted	2i , 2h	Expression in multiple cells in the basal cell layer.
TS22: dermis	Present	Regionally restricted	2h , 2i	Expression in a smaller fraction of cells of the future dermis.

Structure	Level	Pattern	Image	Note
TS24: epidermis	Present	Regionally restricted	2k , 2l	Expression in only a fraction of basal cells.
TS24: dermis	Present	Regionally restricted	2k , 2l	Expression in only a fraction of cells of the dermal compartment.

Structure	Level	Pattern	Image	Note
TS26: epidermis	Present	Regionally restricted	2o , 2n	Expression in only a few cells in the basal cell layer.
TS26: hair follicle	Present	Regionally restricted	2o , 2n	Expression in a considerable number of cells in the hair follicle.
TS26: dermis	Ambiguous		2o , 2n	Authors state that the dermis was mostly non-proliferative.